1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xbe971a452aa6799dfc02f0164fa83bac7b56fca06c0c81df53abf194501abcbf. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/878c5aa7-09b1-4007-8374-aaab31e1d41f.json and https://artists.proofprofile.net/proofs/artist/878c5aa7-09b1-4007-8374-aaab31e1d41f.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x21c114145084222f9840cf7cc01120ca4e06e5302ae9b2ef0ff7163992b2c653. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa68f742f34185e331b0a15121e2872adcfab5dc9e1b8e4762e33d14f39c688b7. Chain 2 (Bitcoin): anchored in block 960273 (2026-07-30T15:42:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x42677728286eee9453f80c5d64556d52c52cc3b93ace3f8c3c66154747386ccf. Chain 2 (Bitcoin): anchored in block 960222 (2026-07-30T07:48:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7a4030d501bd787339f8adc27304a71256cdc6b77f73644c3f2d12441d2511c2. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa613909e13543f29928008971361d8ce25fc7516e45a804119d9cb07a1f601d1. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501205.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0aa19c7de2b98a0a55ac4dfe6f71f4c3e075316fe2ce42216abf07e57ba6c9a9. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501206.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x685565f11f9b43d569ea89b565610a721aaeec63034eb276a99c64df9a545ec2. Chain 2 (Bitcoin): anchored in block 960163 (2026-07-29T23:20:38Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501207.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad1a35cc1ff2019622a5f5bf2731bfaa3adf1b20b8cb3e02343d4c5cde400e3b. Chain 2 (Bitcoin): anchored in block 960203 (2026-07-30T03:35:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501208.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6476e3b76e7f53a85fa63fd8aab8b7685122a3aeac259e8204ab992e91de0ff4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501209.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x78f14b9c0212ac7ad442b5e980daff3b826b4298ff9017e0aa5a7d359d2d97d8. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501210.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe2f5031f528178a65dc7a3e2048aa7792783ab0fe8e3ed49fb36dbeb893c096c. Chain 2 (Bitcoin): anchored in block 960327 (2026-07-31T00:26:26Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501211.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xd3463fd04681d173cf853bc551e62691f106ae5cf7af6e27ddfc21178246fb83. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501212.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x76a816faf33645abeb922267fea83cdc0e0130a9a71299b99481a029ba2cf74d. Chain 2 (Bitcoin): anchored in block 960368 (2026-07-31T08:26:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/SEVPA0501214.